Wilhelm madel



(No Model.)

W. MADBL.

ALARM CLOCK.

110.460,751. Patented 0013.6,1891- UNITED STATES PATENT OFFICE.

VILl-IELM MADEL, OF NIEUKERK, GERMANY.

ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 460,751, dated October 6, 1891.

Application filed January 16, 1891. Serial No. 378,068. (No model.) Patented in Germany February 8, 1890, No. 52,769.

To all whom it may concern.-

Beit known that l, NVILHELM MADEL, a subject of the Emperor of Germany, residing at Nieukerk, in the Empire of Germany, have invented a new and useful Minute-Alarm for Clocks, (for which I have obtained a patent in Germany, Serial No. 52,76),bearing date February 8, 1890,) of which the following is a speciiication.

The object of this invention is an alarm for clocks which allows of being adjusted to a certain minute. The new device is illustrated in the annexed drawings, in which- Figure l isV a vertical section of the clock. Figs. 2 and 3 are detail views; and Fig. et is the front view of the Work.

The device is essentially disposed as follows: Aweight-gearingA is used in the known inannerto impart oscillating movement to the clapperaof thealarm-gong. The clapper-shaft b is provided with two pins c d, which bear by the pull of the alarm-weight against two corresponding arms e f, one of which c is revolubly and displaceably coupled with the minute ratch-disk e2, while the other f is in the same relation to the hour ratch-disk f2. Said two arms e f are inclosed by a fork 7o, which prevents them from participating in the revolution of the two disks 2f? The innermost tube g of the hand device carries at the outer end the minute-hand g', and at the inner extremity the minute-wheel g2. It is, moreover, surrounded by a tube, the outer end of which is provided with the adjustinghand e3 for the minutes, while it carries at vthe inner side the minute rateh-disk e2. The

latter has a cavity or rest which corresponds to a nose on the contiguous surface of the minute-wheel g2. By means of the spring e', Fig. 2, the minute ratch-wheel e2 is pressed against the minute-wheel c2, whereby said ratch-wheel e2 falls with its rest over the nose of the minute-wheel g2, as soon as the latter occupies the corresponding position determined by the minute alarm-hand e3. Thereby the arm e, connected with the minute ratch-disk c2 recedes from respective pin c, which therefore occurs once an hour. A third tube shifted on carries the hour-hand 7L and the l1oi1r-wheel 7L', and is surrounded with another tube provided with the adj listinghand 'L' for the hours, and a disk g2, which is pressed by a suitably-placed spring f against the hour-wheel 7L', and sinks with a rest or cavity over a corresponding' nose provided at the front surface of the hour-wheel 71,', as soon as the latter has assumed a certain position determined by the direction of the hour alarmhand t'. The arm f connected to the hour ratch-disk f2 then undergoes displacement and frees the corresponding pin (Z, which takes place once in twelve hours. If, subsequently, also the arm c connected to the ininute ratch-disk c2 is displaced in the aforedescribed manner when the determined minute has arrived, also the other pin c is released and the dapper-shaft l) is allowed to swing by the pull of the weight.

lVhat l claiin, and desire to secure by Letters Patent of the United States, is-

In an alarm-work for clocks, the combina tion of the arms cf, bearing against the corresponding` pins c d of the dapper-shaft l), with the minute ratch-wheel e2, the minutewheel g2, the hour raton-disk f2, and the hourwheel 7L', as described, and for the purpose specified.

VILHELM MADEL.

Vitnesses:

Ev-ANs BLAKE, HENRY E. BLAKE 

